Self-retaining spike.



G. GALLIGAN.

SELF RETAINING SPIKE.

APPLICATION FILED 111111.21, 1914.

Patented Nov. 24, 1914.

THE NORRIS PETERS CO PHOTOUTHCL, WASHINGTON Dr C .GEORGIJYGALLIGAN, or HEREIN, ILLINOIS.

T all whom it may concern: 1

Be 1t known that I, GEORGE GALLIGAN, a

citizen ofthe United States, residing at: Herr-in, in the county of Williamson and 1 State of Illinois, have invented certain new. and useful Improvements in Self-Retaining Spikesof which the following is a specifi-wl cation. j

The ob ect of this lnventlon 1s to provide a self-retainmg spike so that a driven spike will ,be held in the tie against movement upwardly from the position into which it has been driven.

Itis a further object of the invention to. .b

provide the spike body with a keyway or bore extendingdownwardly therehrfor :the reception of a key, one or more dog bores,

' with dogs therein, being arranged for engagement by the key to be forced orprot has been forced downwardly into the spike ected from the spikebody into the structure of the tie.

A still further object of the invention is to provide one or more dogs a which are loosely disposed in the .borestherefor, and which are so proportioned with respect to the key as to be not only driven but held in a driven or projected position after the key body. 1

Other objects and features of the invention will be more fully described in connec :tion with the accompanying drawing and will be more particularlypointed out and ascertained in and by the appendedclaims. In the drawing :Figure 1 is. a view in elevation of my improved self-retaining spike with the key partially inserted. Fig. 2 is a sectional View thereof. Fig. 3, is a Viewsimilar to Fig. 2, showing thegkey driven intoposition. Fig. 4 is a, fragmentary view of a portion of the key and one ofthe dogs showing the manner in whichi perform the'dual function of fitting the bore 1 j the dogs areprojected by the key.

a i Like characters of reference designate similar parts throughout the different fig:

ures of the drawings.

As illustrated, 1 designates a spike body provided on one endwith a head 2, and on its opposite end with a wedge-shaped entering portion 3. The entering end 3 may be of any desired form in accordance with conditions under which the spike is used.

I provide thespike body with a longitudinally extending keyway or bore l, which is shown extending downwardly through the head 2, toward the entering end 3,

sELF-nErAInINGfsPIK Specification of Letterslatent.

Y ratentednov. 24,1514.

Ajiplication filed March21, 1914; Serial No. 826,327.

throughout a portion of the length of the body 1. The upper end of the key bore 4, maybe enlarged,as indicated at 5, and the lower end of the key boreflis shown cham fered, as indicated'at 6. In cross-section,

the keyhole 4. may becylindrical. Akey 7, which is likewise shown.cylindrical in cross-section, is proportioned to fit snugly inthe bore 4 and the key is provided with a wedge-shapedlower end 8 shaped to abut against the chamfered lower end 6 of the bore 1. A head9 may be provided onthe key 7 to lit the enlarged upper end 5, of the orel.

I provide'one or more dog bores 10 which intersect the key bore l and which extend laterally of the longitudinal axis of the spike body 1 111 a manner to open. at one of the sides of said body,

as clearly shown in Figs. Qaand 3. In the preferred construction, the dog boreslO are at right angles to the key bore 4 and the lowermost dog bore 10 is disposed above the lower end ofthe bore.4.-. A dog 11, is provided for each dog bore 10, to be projected from one side of the spike body 1 when the key 7 is driven home. j i

Theiparts are so proportioned, in the construction shown, that when the dogs 11 are in a retracted position, which may be will-lie substantially flush with the side 13 jof th e spike body, and their innerends will abut one portionof the key bore 4-, as clearly shown in Fig. 2. This will limit retraction of the. dogs 11 into the spike body 1 tojust the necessary extent so asto bring the conical ends 12 at least flush with the side 13,

without any lost motion or useless play .in I

projecting the dogs 11 after the spikeis driven. I may; if desired, round-the inner ends ofthe dogs 11, as indicated at 14 to 4 transverselythereof, and providing entrance ways for. the wedge; end S of the key their outer endsp conical, as 1nd1cated at 12;

notonly functionto project the dogs into i the body of the tie, from the spike body, as shown inFig. 3, but will also look the dogs and hold them in such projected position,

By means of the structure shown, all niceties of fit are avoided and machined juncture of the dog or parts are not necessary as the bores can be cored in the spike and the key 7 and dogs 11 can be rough forgings if desired. Furthermore, reliance is not placed upon fulcrum dogs with the spike to take the strain imposed by the rail in lifting the spike, as the dogs have a most effective structural engagement with the structure of the spike body in order to take 1 the strain.

It is believed that the device of my invention willibe clearly understood from the foregoing description and while I have hereinshown and described one specific form of my invention, I do not wish to be limited ing through to one. side ofcthe body, a dog I mounted in said dog bore to have endwise sliding movement in a direction at right angles; to the line in which the spike is driven, and a key adapted to be driven into said key bore after the spike has been seated and to cause endwise extension of said dog and penetration thereof into the member in 1 which the spike is embedded.

In a'self-retaining spike, aspike body provided with a longitudinally extending key bore and adog bore intersecting the key bore to extend at right angles thereto 1 and opening to one side of the spike body,

a retaining ,dog loosely and slidably disposed in the dog bore to be capable of longitudin' al movement in the direction of the extent of the dog bore, and a keyadapted to be driven'into the key bore to: project the dog endwise from one side of the spike body.

3. In a seltretaining spike, a spike body provided with a key bore extending longitudinally therein and otsubstantially cylindrical cross-section, said body having a cylindrical dog bore intersecting the key bore and opening at one side of the spike body, a cylindrical dog loosely and slidably mounted in the dog bore and having a rounded end adapted to fit against the key bore, and a 7 key of circular cross-section j fitting the key bore and having, a wedge-shaped end for projection of thedog from one ide of the spike body, said key being of; sufficient length to be driven into engagement with tudinally and downwardly beyond said odog to first provided with a key bore extending longisame and extending at right angles there from to open at one side of the spike body,

thereof and a dog bore above the lower end of the key bore intersecting the a dog loosely and slidably mounted in said dog bore adapted to be retracted into fiush relation with one side of the spike body and into engagement with the key bore when the spikeis driven and capable of movement to an extended position in line with the extent driven into the key bore against the inner end of said dog and beyond the same to first project and then look the dog in a projected position. i v

In a self-retaining spike, a spike body provided with a longitudinally extending bore and a plurality of dog bores formed to intersect the key bore at right angles and to open at one side of the spike and disposed above the lower end of the key bore, a dog loosely andslidably mounted ineach dog bore to be capable of endwise movement therein, and a ,keyadapted to be driven downwardly in the key bore into successive engagement with and beyond the lowermost dogs and each of said dogs provided with a rounded end toengage: with the key as driven into the key bore and to bear fric.

tionally against this key when in its seated relation to lock the key in place.

6. In a self-retaining spike, a spike body provided with a longitudinally extending key bore and a dogbore at right angles thereto and intersecting the key bore and opening, at one side of the spike body, a cylindrical dog loosely, and slidably mounted 'in' the dog bore and adapted to be retracted into the key bore to be capable of endwise movement therein, and a key adapted to be driven into the key-bore into engagement with and past the dog for projecting the latter outwardly from the spike body in the direction of the length'of said dog.

In testimony whereof I. afiixmy signature in presence of twowitnesses.

WVitnesses:

G120. K. Carol-Iron, G. E, ANDERSON.

' Copier: of thiapatent maybe obtained for five cents each, by addressing the Commissioner ofratezits,

' Washington, D. G.

GEORGE extras-xx.

of said dog bore, and a key adapted to be 

